Important BB defense question

[Cerril]

If you're going to be HU, you can defend fairly liberally, but not too liberally. Bad aces are alright, most kings, most suited queens, two cards nine or higher, pairs 44+. I don't like hands with a 2 or 3 because of how little they do for your hand.

You need to be fairly liberal, but against a 20-30% ASB you can actually be pretty tight. The standards I gave (tighter than yours) are more appropriate for 60%+ ASB. So trim down to better aces, better kings, Q9+, TJ, and pairs 55 or 66+ at least. 20-30% ASB means he's got pretty loose blind stealing standards (much tighter than ideal, which - though situation dependent - should often be closer to 40-45%). Don't reraise against someone like this, who isn't likely to be making a play with junk, unless you have a hand that's likely to be best (A7, KQ, 77, and maybe for deception with some lower suited connectors like T9s or JTs). No point in putting money in without being ahead unless they're easy to manipulate postflop with pure aggression. As was mentioned, you aren't getting much in the way of implied odds even if your opponent has a 100% WSD

If the SB calls, unless he's a complete idiot, he's probably got a better hand still. You're looking at dropping anything that you wouldn't normally defend multiway, but also dropping hands that only have multiway value (pairs 66 or smaller, small suited connectors, suited big-little). Reraise only with genuine strength. If the SB defends most (60%) of the time, you can probably get away with playing more suited aces and pairs, especially if he tends to play in a straightforward manner postflop.

ASB 20-30 is closer to what you'd see in a full ring game than the hyper aggro players of 6-max, so the key is not to be so loose that his steal raises are for value.